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Nature of the Case

A public interest non-profit and four senior Swiss women sue the government of Switzerland in the European Court of Human Rights for failing to mitigate the effects of greenhouse gas (GHG) emissions, which had adverse effects on their health due to their age and gender. After developing a novel legal test through which an individual or association may establish standing to sue a State for acts or omissions related to climate change, the Court held not only that the non-profit had standing to sue, but that Switzerland reneged on their positive duties under international law to mitigate the effects of climate change and violated the non-profit’s right to a fair trial.

Summary

Facts of the Case and Procedural History:

Environmental protection non-profit Verein KlimaSeniorinnen Schweiz and four of its members, sued the government of Switzerland under Article 34 of the European Convention for the Protection of Human Rights Fundamental Freedoms (“Convention”). The non-profit and its members — all of whom are Swiss women in their seventies or older — claim that the Swiss government reneged on its positive obligation to mitigate the effects of greenhouse gas (GHG) emissions. All four women allege that they experienced adverse health effects related to repeated heatwaves in Switzerland, which exacerbated cardiovascular issues, asthma, pulmonary disease, and more. Some women also claim this severely impacted their ability to participate in Swiss society, forcing them to stay home.

The applicants allege that Switzerland’s failure to pass sufficiently effective, binding legislation to help blunt expected global temperature increases caused by GHG emissions violated their rights under the Convention, specifically Articles 2, 6, 8, and 13, regarding the rights to life, access to court, respect for private and family life, and an effective remedy, respectively. They claim that Switzerland’s legislative omissions resulted in the heat waves that caused the alleged harm, due in part to older women’s increased susceptibility to such harm.

The applicants initially sued in the domestic Swiss court system, and were repeatedly dismissed across multiple appeals that culminated at the Federal Supreme Court of Switzerland, primarily on standing grounds. There, the Court upheld the dismissal the applicant’s complaint, holding that the suit was actio popularis, or for the protection of “the general interest” instead of individual interests. Actiones popularis suits are not permissible in Switzerland, nor before the European Court of Human Rights generally. The applicants then turned to the European Court of Human Rights, seeking recourse under the Convention.

Legal Schema:

The Grand Chamber of the European Court of Human Rights took on the task of determining whether the applicants had a right to sue Switzerland for omissions related to Switzerland’s climate change obligations under Articles 2 and 8 of the Convention. As the Court had not yet considered whether general harms related to climate change were litigable, it was required to answer a number of novel legal questions, including:

  1. How an individual may claim Article 34 “victim status” in general climate-change litigation;
  2. How an association may establish locus standi (standing) in climate-change litigation as a representative of a class of individuals (and overcome a claim that the case is actio popularis); and
  3. What an individual or organization must establish in a complaint to demonstrate right to sue under Articles 2 and 8, specifically, of the Convention based on climate-change-related harms. 

Victim Status:

Article 34 of the Convention requires that any individual, group of individuals, or non-governmental organization must be a “victim of a violation… of the rights set forth in the Convention or the Protocols thereto.” The Court held that, for an individual to claim victim status under this provision from climate-change-related harms, that individual must first show a “high intensity of exposure to the adverse of climate change.” In other words, the risk associated with the government’s act or omission must be “significant.”  The individual must also demonstrate “a pressing need to ensure the applicant’s individual protection,” as other “reasonable measures to reduce harm” are absent or inadequate.

Locus Standi for Associations:

The Court held that, in order for an association to establish standing to file an Article 34 complaint in climate-change litigation, the association must be “lawfully established” or “have standing to act” in the particular jurisdiction, demonstrate a “dedicated purpose in accordance with its statutory objectives” arising from climate change, and be “genuinely qualified and representative” to combat the adverse effects of climate change on behalf of its members. Establishing standing requires an individualized determination in each individual case, with attention paid to the association’s non-profit character, purpose, membership, and governance, and the Court’s interest in the “proper administration of justice.”

Articles 2 and 8:

Lastly, the Court held that the test to establish whether an applicant may bring a suit under Articles 2 and 8 required the applicants to establish standing according to the newly established tests described above, in order to determine whether their claims are “within the scope” of the rights guaranteed by the articles.

Applying the Tests:

The Court dismissed the four individual applicants’ claims under Article 8 on the basis that the harm experienced did not reach the “high intensity of exposure” standard. This meant that the individual applicants could only claim victim status unless they demonstrated “exceptional circumstances” to necessitate establishing “potential victim status” relating to “future risk.” As they failed to do this, their claims were dismissed. 

However, the Court held that the applicant association did sufficiently state grounds for establishing locus standi, as it was a legally established Swiss non-profit whose purpose was reducing GHG emissions on behalf of its Swiss membership of 2,000 older Swiss women, who had greater risk of harm arising from climate change. A key consideration for the Court was that, because the individual applicants had no access to the Swiss court system, it was “in the interests of the proper administration of justice to grant standing.” 

The Remaining Article 2 and 8 Claims:

The Court unanimously dismissed all claims arising from Article 2 of the Convention, holding that the harm alleged did not reach the standard of “real and imminent risk” required for such claims. That left only one remaining question: whether the applicant association had a claim under Article 8. States like Switzerland are allowed a wide margin of appreciation as to whether they have complied with their positive duties to protect the environment. If their actions fall within that margin, the Court will not find a violation.

However, the Court held that Switzerland had failed to comply with their positive obligations to protect the environment. Switzerland was required by their domestic 2011 CO2 Act to reduce GHG emission levels by 20% compared to 1990 levels, yet Switzerland had only reduced those levels by 11%. Efforts to modify that Act were met with a rejected referendum in 2021, and the 2022 Climate Act that succeeded the referendum had no bite, only requiring a “commitment to adopt the concrete measures ‘in good time.’” The Court opined that these inactions fell outside the “margin of appreciation” allotted to Switzerland, and constituted violations of Article 8. 

The Article 6 Claim:

The Court also found a violation of Article 6, which pertains to whether the applicants had access to an “effective judicial remedy” — essentially, the right to a fair trial. To allege an Article 6 violation, an applicant must prove that they were denied access to a domestic court arising from a genuine and serious dispute as to a violation of their civil rights. In the context of climate change litigation, the outcome of the domestic court proceedings “must be ‘directly decisive’ for the applicant’s right.”

The Court held that the repeated judicial dismissals in domestic Swiss courts on standing grounds — from an administrative authority all the way to the Federal Supreme Court — were done arbitrarily and without effective analysis on the merits of the applicants’ claims. Swiss courts dismissed those claims as actio popularis even though the applicant association had sufficiently alleged specific civil rights violations of its members. This was deemed a violation of the applicant association’s Article 6 rights.  KlimaSeniorinnen establishes a framework for potential future cases regarding government inaction toward climate change mitigation. Other Member States to the convention will likely need to reinterpret their own climate change policies to ensure compliance and avoid similar lawsuits.

Enforcement of the Decision and Outcomes

On the same day this case was decided, the Court also dismissed two other climate-related cases (Carême v. France and Duarte Agostinho and Others v. Portugal and 32 others), but on mainly procedural grounds. Carême was dismissed for failing to meet the same “victimhood” test as is detailed in KlimaSeniorinnen, and Duarte Agostinho was dismissed partially due to failure to exhaust domestic remedies in Portugal and partially due to lack of territorial jurisdiction. While the Duarte Agostinho decision did not touch the merits, it did acknowledge that many points made by applicants may be admissible once domestic remedies are exhausted.

However, two months after the Court decided KlimaSeniorinnen, Swiss Parliament’s lower house voted by a wide margin to disregard the ruling, on the grounds that the European Court of Rights overstepped their jurisdictional bounds and engaged in impermissible judicial activism. Moreover, in August of 2024, the Swiss Federal Council claimed without evidence in a press release that Switzerland was already in compliance with its climate policy obligations, while criticizing the “broad interpretation” the European Court of Human Rights gave to the Convention. The Council then claimed they would comply with the ruling by closing loopholes in existing and forthcoming climate regulation.

Amnesty International condemned Swiss inaction in spite of KlimaSeniorinnen, accusing the Swiss Federal Council of “sending a dangerous signal to the Council of Europe . . . that the Court’s rulings are not binding and that climate protection measures can be taken à la carte.” Amnesty International further called on Switzerland to comply with its international climate obligations, and claimed the closing of regulatory loopholes was “not enough to address human rights violations.”  

Following the case’s outcome, the implementation of the judgment will be overseen by the Committee of Ministers, who will engage in a dialogue with the State to confirm it is complying with its obligations under the Convention. 

Even so, Switzerland engaged in the dialogic process with the Committee of Ministers, submitting several action plans to the Committee, which is currently in the process of overseeing the implementation of the judgment. This began with the submission of an October 2024 “action plan,” detailing plans to pay the costs and expenses award, further revise Switzerland’s CO2 Act, and readjust their nationally determined contribution in light of KlimaSeniorinnen. However, in March 2025, the Committee of Ministers rejected some of Switzerland’s plan, particularly in light of the Swiss position that legislative changes enacted before KlimaSeniorinnen “sufficed to comply with its ECtHR obligations.” 

After the March 2025 decision, the Swiss government took practical steps to present a “carbon budget and further readjust its national determined contribution commitments. And in September 2025, the Committee of Ministers accepted Switzerland’s position, declaring its actions to be sufficient and in compliance with KlimaSeniorinnen — over the objections of the KlimaSeniorinnen applicants. This decision has been subject to criticism, with the European Journal of International Law calling it “deeply concerning.” Still, Committee of Ministers supervision over the Swiss plan has not concluded, and Switzerland will likely submit a report as to whether it is meeting its obligations in 2026.

Significance of the Case

Several member States of the Convention intervened in this case, fervently urging the Court not to rule in the applicants’ favor. To these intervenors, the application constituted a “far-reaching expansion of the Court’s case-law on admissibility and merits of Articles 2 and 8,” as Ireland put it. The Court reinterpreted Article 8 to encompass the “serious adverse effects of climate change” on the “life, health, well-being and quality of life” of individuals within each individual State’s jurisdictions. This ruling puts teeth on what had previously been relatively unenforceable international climate law and gives the Court the ability to become more involved in European domestic affairs related to mitigating climate change. 

KlimaSeniorinnen represents the first time a regional human rights court has enshrined climate protection as a human right. This decision follows several domestic court and international human rights body rulings that such a right exists and is litigable. The opinion reads like a step-by-step manual on everything a potential litigant must consider when forming such a complaint, particularly with regard to victimhood and standing. The implication of the tests KlimaSeniorinnen promulgates is that it will likely be easier for associations to file such suits than for individual applicants.

KlimaSeniorinnen’s holding on Article 6 also reveals the Court’s inclination to directly engage with scientific evidence and chastise other domestic courts for failing to adequately consider such evidence. This indicates that domestic courts may be required to engage in the actual merits of climate change cases, as Switzerland failed to do in KlimaSeniorinnen, before dismissing such suits as actio popularis.

Even so, Swiss government inaction in the face of the mandate in KlimaSeniorinnen reflects growing skepticism in Europe of the powers that international courts possess to enforce international legal violations. By refusing to meaningfully respond to the Court’s order in KlimaSeniorinnen, the Swiss government has signaled to other Convention signatories that the Court’s enforcement mechanisms are moot.

Other Resources

Corina Heri, Charlotte E. Blattner & Tobias Cadalbert, Another Brick in the Wall of KlimaSeniorinnen: The Committee of Ministers’ September 2025 Monitoring Decision; EJIL: Talk!, 2025; available at: https://www.ejiltalk.org/another-brick-in-the-wall-of-klimaseniorinnen-the-committee-of-ministers-september-2025-monitoring-decision/

European Convention for the Protection of Human Rights and Fundamental Freedoms, as amended by Protocols Nos. 11 and 14; Council of Europe; available at: https://www.refworld.org/legal/ agreements/coe/1950/en/18688 

European Court of Human Rights delievers ground-breaking climate change decision; Norton Rose Fulbright, 2024; available at: https://www.nortonrosefulbright.com/en/knowledge/publications/f0569156/ european-court-of-human-rights-delivers-ground-breaking-climate-change-decision

Victory for Swiss Senior Women for Climate Protection: Climate protection is a human right; Greenpeace International, 2024; available at: https://www.greenpeace.org/international/press-release/66344/victory-for-swiss-senior-women-for-climate-protection-climate-protection-is-a-human-right/

Sandra Arntz & Jasper Krommendijk; Historic and Unprecedented; Verfassungsblog, 2024; available at: https://verfassungsblog.de/historic-and-unprecedented/ 

Climate change can breach the European Convention on Human Rights: a new impetus for rights-based litigation?; Dentons, 2024; available at: https://www.dentons.com/en/insights/articles/2024/april/30/ climate-change-can-breach-the-european-convention-on-human-rights-a-new-impetus 

Ajit Niranjan, Swiss lawmakers reject climate ruling in favour of female climate elders; The Guardian, 2024; available at: https://www.theguardian.com/world/article/2024/jun/12/swiss-lawmakers-reject-climate-ruling-in-favour-of-female-climate-elders 

Le Conseil fédéral clarifie sa position sur le verdict de la Cour européenne des droits de l’homme concernant la protection du climat; Le Conseil federal du Suisse, 2024; available at https://www.admin.ch/gov/fr/accueil/documentation/communiques/communiques-conseil-federal.msg-id-102244.html 

Le conseil Fédéral doit s’engager en faveur de la protection du climat et des droits humains; Amnesty International, 2024; available at: https://www.amnesty.ch/fr/pays/europe-asie-centrale/suisse/docs/2024/le-conseil-federal-doit-sengager-en-faveur-de-la-protection-du-climat-et-des-droits-humains/ 

Bilan d’action: Arrêt Verein KlimaSeniorinnen Schweiz et autres c. Suisse du 9 avril 2024; Secretariat of the Committee of Ministers, 2024; available at: https://en.klimaseniorinnen.ch/wp-content/uploads/2024/10/Bilan-d-Action-Suisse.pdf